/* ==========================================================================
   Design System & CSS Variables - Dark & Grey Aesthetic
   ========================================================================== */
:root {
  /* Color Palette */
  --bg-base: #0b0d11;
  --bg-surface: #12151b;
  --bg-surface-elevated: #181c24;
  --bg-card: #151821;
  --bg-card-hover: #1b202c;
  --bg-input: #11141a;
  
  /* Borders */
  --border-subtle: #1e232f;
  --border-medium: #2a3141;
  --border-bright: #3f475a;
  
  /* Typography Colors */
  --text-main: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverted: #0b0d11;
  
  /* Accent & Highlights */
  --accent-light: #e2e8f0;
  --accent-silver: #cbd5e1;
  --accent-glow: rgba(203, 213, 225, 0.08);
  --status-online: #10b981;
  --status-beta: #f59e0b;
  --status-archived: #64748b;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Menlo, Monaco, Consolas, monospace;

  /* Spacing & Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --container-max: 1080px;

  /* Shadows */
  --shadow-subtle: 0 4px 12px rgba(0, 0, 0, 0.25);
  --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 20px rgba(226, 232, 240, 0.04);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-base);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Background Atmosphere Pattern */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 600px;
  background: radial-gradient(circle at 50% 0%, rgba(148, 163, 184, 0.07) 0%, rgba(11, 13, 17, 0) 70%);
  pointer-events: none;
  z-index: 0;
}

.site-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem;
  position: relative;
  z-index: 1;
}

/* ==========================================================================
   Header & Profile Section
   ========================================================================== */
.header {
  margin-bottom: 3.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.avatar-monogram,
.brand-logo-container {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  background: #ffffff;
  border: 1px solid var(--border-medium);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-subtle);
  overflow: hidden;
  padding: 4px;
  flex-shrink: 0;
}

.brand-logo {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.brand-info h1 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-main);
  line-height: 1.2;
}

.brand-info .tagline {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-top: 0.2rem;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.85rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.status-indicator-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--status-online);
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.6);
  animation: pulse-dot 2.5s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.9); }
}

.bio-paragraph {
  max-width: 680px;
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.65;
}

.social-links {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.social-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.9rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.social-button svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.social-button:hover {
  background-color: var(--bg-surface-elevated);
  border-color: var(--border-bright);
  color: var(--text-main);
  transform: translateY(-1px);
}

/* ==========================================================================
   Projects Tabs Navigation (Personal vs Recommended)
   ========================================================================== */
.projects-tabs-bar {
  display: flex;
  align-items: center;
  margin-bottom: 2rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
}

.tabs-nav {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
}

.tab-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 0.5rem 1.15rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  transition: all var(--transition-fast);
  font-family: inherit;
  outline: none;
}

.tab-btn:hover {
  background-color: var(--bg-surface-elevated);
  border-color: var(--border-medium);
  color: var(--text-main);
}

.tab-btn.active {
  background-color: var(--bg-surface-elevated);
  border-color: var(--border-bright);
  color: var(--text-main);
  box-shadow: 0 0 16px rgba(226, 232, 240, 0.05);
}

.tab-btn svg {
  width: 16px;
  height: 16px;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.tab-btn:hover svg,
.tab-btn.active svg {
  color: var(--accent-light);
}

.tab-badge {
  font-size: 0.725rem;
  font-family: var(--font-mono);
  background-color: var(--bg-card);
  color: var(--text-muted);
  padding: 0.1rem 0.45rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
}

.tab-btn.active .tab-badge {
  background-color: var(--bg-input);
  color: var(--accent-light);
  border-color: var(--border-medium);
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
  animation: tabFadeIn 220ms ease;
}

@keyframes tabFadeIn {
  from {
    opacity: 0;
    transform: translateY(3px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Empty / Placeholder Card */
.status-empty {
  background-color: var(--text-muted);
  opacity: 0.45;
}

.empty-card {
  border-style: dashed;
  border-color: var(--border-medium);
  background-color: rgba(21, 24, 33, 0.45);
  cursor: default;
}

.empty-card:hover {
  border-style: dashed;
  border-color: var(--border-bright);
  background-color: var(--bg-card);
  transform: translateY(-2px);
}

.empty-card .project-title {
  color: var(--text-secondary);
}

.empty-card .project-description {
  color: var(--text-muted);
  font-style: italic;
}

/* ==========================================================================
   Section Headers
   ========================================================================== */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.section-title {
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.section-count {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  background-color: var(--bg-surface);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
}

/* ==========================================================================
   Projects Grid
   ========================================================================== */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-bottom: 4rem;
}

@media (min-width: 640px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .projects-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.project-card {
  position: relative;
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-decoration: none;
  color: inherit;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-subtle);
  overflow: hidden;
}

.project-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(203, 213, 225, 0.2), transparent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.project-card:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--border-medium);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.project-card:hover::before {
  opacity: 1;
}

.project-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.project-icon-and-type {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.project-type-tag {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.project-status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.status-active {
  background-color: var(--status-online);
}

.status-beta {
  background-color: var(--status-beta);
}

.external-arrow {
  color: var(--text-muted);
  transition: transform var(--transition-fast), color var(--transition-fast);
}

.project-card:hover .external-arrow {
  transform: translate(2px, -2px);
  color: var(--accent-light);
}

.project-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-main);
  letter-spacing: -0.015em;
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.project-card:not(.empty-card) {
  cursor: pointer;
}

.project-card-main-link {
  color: inherit;
  text-decoration: none;
}

.project-card-main-link::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
}

.card-inline-link {
  position: relative;
  z-index: 2;
  color: var(--accent-light);
  text-decoration: underline;
  text-underline-offset: 3px;
  word-break: break-all;
  transition: color var(--transition-fast), text-decoration-color var(--transition-fast);
}

.card-inline-link:hover {
  color: #ffffff;
  text-decoration-color: #ffffff;
}

.project-description {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.project-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
  gap: 0.5rem;
  flex-wrap: wrap;
}

.tech-tags {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.tech-pill {
  font-size: 0.725rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.03);
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.04);
}

.project-card:hover .tech-pill {
  color: var(--text-secondary);
  border-color: var(--border-subtle);
}

.visit-label {
  font-size: 0.775rem;
  font-weight: 500;
  color: var(--accent-silver);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

/* ==========================================================================
   Quick Links / Ecosystem Section
   ========================================================================== */
.ecosystem-section {
  margin-bottom: 4rem;
}

.links-list {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.link-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.25rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: inherit;
  transition: all var(--transition-fast);
  gap: 1rem;
}

.link-row:hover {
  background-color: var(--bg-surface-elevated);
  border-color: var(--border-medium);
  transform: translateX(3px);
}

.link-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.link-icon-container {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
}

.link-icon-container svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
}

.link-title {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-main);
}

.link-subtitle {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.link-url-pill {
  font-family: var(--font-mono);
  font-size: 0.775rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.link-row:hover .link-url-pill {
  color: var(--accent-light);
}

/* ==========================================================================
   No Results Message
   ========================================================================== */
.no-results {
  display: none;
  padding: 3rem 1.5rem;
  text-align: center;
  background-color: var(--bg-surface);
  border: 1px dashed var(--border-subtle);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.no-results p {
  margin-top: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-links {
  display: flex;
  gap: 1.25rem;
}

.footer-link {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--text-secondary);
}

.back-to-top {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.85rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-family: inherit;
  transition: color var(--transition-fast);
}

.back-to-top:hover {
  color: var(--text-main);
}

/* ==========================================================================
   Responsive adjustments for Link Rows (Quick Links & Support)
   ========================================================================== */
@media (max-width: 640px) {
  .link-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .link-url-pill {
    margin-left: 3rem;
  }
}